What we suggest instead, is consolidating your assets into Ethereum (or any other token that you can deposit on an exchange) and then send the consolidated asset from your Rainbow wallet to your account on a centralized exchange like Coinbase or Binance.
Centralized exchanges require some additional info as well as having an account open with them to finish the cashing-out process. Here are a few short articles describing how to send assets to your account on each of these exchanges:
📌 We're working on adding ways to withdraw directly from within Rainbow in the future! If you have any questions about the process or any difficulty feel free to reach out to us on Twitter or email us at [email protected]